Refrigeration-compressor.



W. R. McGINNIS.

REFRIGERATION COMPRESSOR.

APPLICATION FILED SEPT- 28. I914.

Patented Oct. 31, 1916.

2 SHEETS-SHEET I.

W. R. McGlNNlS.

"REFRIGERATION COMPRESSOR.

APPLICATION FILED SEPT.28, 1914.

2 SHEETSSHEET 2- venfmr Patented Oct. 31, 1916.

l TEE, R. MCGININIS, OF ST. LOUIS, MISSOURI.

FRIGERATION-COMPRMSQR.

iaoaeea Specification of. Letters Patent.

Patented at. at, rate.

Application filed eeptember 28, 1914. Serial No. 863,799. I

To all whom it may concern:

Be it known that I, WALTER R. MOGINNIS,

a citizen of the United States, and a resident of St. Louis, Missouri,have invented certain new and useful Improvements inRefrigeration-Compressors, of which the following is a specification.

My invention relates to an improved compressor for use in refrigerationor ice-making, and has for its object to provide a compressor in the useof which stufl'ing boxes are dispensed with and the use of lubricantsdispensed'with, lessened or minimized; in the accomplishment of whichobject 1 cmploy a piston of less diameter than its cylinder' andoperating in cooling fluid contained in the cylinder, and operatingagainst a flexible or resilient suction-and-compression der-head 4. Attheend of the evaporator 14 opposite to the inlet-pipe lfl'the outletpipe 22 leads to the suction-valve 23,- mounted' in the tit diaphragm.

In the drawingsFigure 1 is a longitudinal vertical view in sectionof adevice embodying my invention. Fig. 2 isa'top plan view of the same, aportion of the bedplate being broken away.

In that embodiment of my invention which is displayed in the drawings,the bedplate 3 is slightly concaved as .indicated by the numeral 4 toserve as the head of the cylinder 5 in which the convex-faced piston 6reciprocates; the diameter of the piston 6 being slightly less than thatof the: cylinder 5 so as to permit it to operate freely in the.

condensing fluid contained in the cylinder 5, which fluid is constantlyfed to the cylinder 5 by the inlet-pipe 7, and conducted from thecylinder 5 by the overflow-pipe 8.

Upon the bed-plate 3 the motor 9 is mounted, by which the drive wheel 10is driven, imparting reciprocating movement to the piston 6 by meansof-the connecting-"rod '11,-

lever-arm 12 and piston-rod 13 as shown in Fig. 1.

' I have illustrated the evaporator 14 as being mounted beneath thefloor or shelf 15 upon which the bed-plate 3 is mounted. Therefrigerating liquid is admitted to the evaporator 14 through the pipe16, and its flow controlled by the valve 17, From the valve 17 the pipe18 leads to the condensing coil 19 in the cylinder 5. 'From the "otherterminus of the coil 19 the pipe20 leads to the discharge-valve 21 inthe concave cylin-- cylinder-head 4. Within the cylinder 5 and above thehead 4,1 provide a resilient or flexible watertight diaphragm orauxiliary piston 24 which is flexed upwardly and downwardly by themovement of the piston 6.

As the gas begins to form in the evapo- I F rator 14 the piston 6 is setin motion, on its upstroke drawing after it the central portion ofthediaphragm 24, carrying or aspirating the gas through the suctionvalve 23;

said gas is compressed by the return stroke of the vpiston 6 anddiaphragm 24, and forced through the discharge valve 21 and through thepipe 20 to the condensing coil 19.

By means of the describedv construction I have provided a compressionsystem in which lubricant is practically dispensed with and in which nolubricant can enter the condensing'coil. It is well known in this artthat lubricant once admitted to the condenser. tends to form a thin filmof such lubricant on the inner surface of the condenser colls, whlchacts 'i-as a non-conductor of heat and reduces the eficiency of thecondenser.

' The condensin fluid in the cylinder 5 serves to water-Jacket thediaphragm 24, preventing superheating of the gas during compression andcarrying ofl' much of the heat'co'ntained inthe gas. The condensingfluid assists in keeping the diaphragm 24 gas-tight, while the loosenessof'the piston G in the cylinder 5 prevents friction between said pistonand cylinder and the wear consequent upon such friction. Furthermore Idispense entirely with the-use of stuflingboxes, either for thepiston-rod 13 or other parts 'of my mechanism, which stuflingboxes haverequired great care in construction, installation and maintenance toprevent leakage of gas, and have required am 1e lubricationaving thusdescribed my invention,

What claim as new and desire to have secured tome by the grant ofLetters Patent,

1. In a refrieration compressor a cylinder having a xed head at itsbottom, a flexible diaphragm mounted above said head, a piston ofslightly less diameter than the cylinder and amass of fluid contained inthe cylinder above said diaphragm in combination with a condensing coilmounted within the cylinder, and an evaporator.

2; lfn a refrigeration compressor a cylinmounted within the cylinder,and .an evapoder.having a. concave fixed head at its bottom, a flexiblediaphragm mounted above said head, a piston of slightly less diameterthan the cylinder" and a mass of fluid contained in the cylinder abovesaid diaphragm in' combination with a condensing coil 3. In arefrigeration compressor a piston, a condensing coil, a cylinder inwhich said piston and coil are mounted, and means ior supplying coolingfluid to the interior of the cylinder.

'4. In a refrigerator compressor, in combination, a bed-plate; acylinder mounted vertically on said bed-plate, and having a concave headat its bottom; a flexible diaphragm mounted in the lower end of saidcylinder above said concave head; a piston of less diameter than thesaid cylinder; :1 condensing coil mounted in the cylinder above saidpiston; and an evaporator having suitable valve connections with saidcylinder at a point beneath said diaphragm.

In testimony whereof, I have signed my name to this specification, inpresence of .two subscribing witnesses.

WALTER R. MCGINN IS.

Witnesses:

J. C. TAYLOR, N. E. Bnooxman,

